The IHS22-E4 has been validated through microbial testing to inactivate the following microorganisms: Cryptosporidium, Giardia, E.Coli and Fecal Coliform. As part of the Professional Series, the IHS22-E4 offers outstanding performance in combination with pre-filtration for a complete solution. Recommended for commercial applications, with flow rates up to 36 gpm (136 lpm).